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70HDT Datasheet(PDF) 3 Page - 3M Electronics

Part # 70HDT
Description  Self-Fusing Silicone Rubber Electrical Tape 70 HDT with Tapered Edge
PDF  4 Pages
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Manufacturer  3M [3M Electronics]
Direct Link  http://www.3m.com
Logo 3M - 3M Electronics

70HDT Datasheet(HTML) 3 Page - 3M Electronics

  70HDT Datasheet HTML 1Page - 3M Electronics 70HDT Datasheet HTML 2Page - 3M Electronics 70HDT Datasheet HTML 3Page - 3M Electronics 70HDT Datasheet HTML 4Page - 3M Electronics  
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4. Allow the termination to air-dry in the
upright position before applying the
voltage.
This method, when tested on various
surfaces including silicone rubber and glazed
porcelain, has repeatedly produced a coating
thickness of from 0.2 to 0.5 grams per
square inch of surface.
The terminations are then tested in a
contamination building. All terminations are
mounted vertically. The uniform fog rate
called out in ASTM-D-232 is obtained by
the use of special atomizing, wide-angle
nozzles.
An on/off cycle is controlled to give a fog
rate of 7 to 9 milligrams per square inch per
minute.
Each sample is energized at 8.7 kV. The
system is set up such that approximately
500 milliamps trip the circuit breaker. All
samples are recontaminated every seven
days. The new contaminant is applied over
whatever contaminant remains.
The sample is considered to have failed
when:
. 500 milliamps over the surface
continuously cause the circuit break to
trip.
2. Cable failure occurs.
3. The surface of the termination is
severely burned.
The time in hours for each failure is
recorded the results are as follows:
Tape Termination
Protection
Time to
Failure
No protection
Scotch® Silicone Rubber
Electrical Tape 70 HDT
self-fusing
15 hrs.
100 hrs. MIN



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